246135221 has 2 divisors, whose sum is σ = 246135222. Its totient is φ = 246135220.

The previous prime is 246135199. The next prime is 246135277. The reversal of 246135221 is 122531642.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239940100 + 6195121 = 15490^2 + 2489^2 .

It is a cyclic number.

It is not a de Polignac number, because 246135221 - 2²² = 241940917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (246135521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123067610 + 123067611.

It is an arithmetic number, because the mean of its divisors is an integer number (123067611).

Almost surely, 2^246135221 is an apocalyptic number.

It is an amenable number.

246135221 is a deficient number, since it is larger than the sum of its proper divisors (1).

246135221 is an equidigital number, since it uses as much as digits as its factorization.

246135221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 246135221 is about 15688.6972371832. The cubic root of 246135221 is about 626.6974409903.

Adding to 246135221 its reverse (122531642), we get a palindrome (368666863).

The spelling of 246135221 in words is "two hundred forty-six million, one hundred thirty-five thousand, two hundred twenty-one".